Dear ffriend, welcome to HCM.
How old is your mother?
diabetic? recurrent UTIs?
yes , the picture looks like that of CKD, probably a UTI related AKI (acute kidney injury
this could be stage L or E of RIFLE criteria.
Pl. let me know the results of all the tests to comment meaningfully.
enlarge sella is not typical in CKD. could be unrelated or calcium metabolism
pl. follow your nephrologist's advice and keep me posted on the progress.
detailed evaluation including, USG, urine culture, probably kidney biopsy
in due course will be done.
hope I have answered you satisfactorily.